/* Forge & Glow Premium Design System */
:root {
  --bg: #050505; /* Deepest Black */
  --surface: #0f0f0f;
  --surface2: #161616;
  --border: #1a1a1a;
  
  --gold: #D4AF37; /* Classic Gold */
  --gold-bright: #FFD700;
  --gold-dim: rgba(212, 175, 55, 0.2);
  
  --text: #f0f0f0;
  --muted: #888888;
  
  --push: #e8521a;
  --pull: #1a9be8;
  --legs: #22c55e;
  
  --accent: var(--gold);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* AUTH UI */
#auth-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 40px;
  border-radius: 20px;
  width: 100%;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.auth-card h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 48px;
  letter-spacing: 2px;
  margin-bottom: 8px;
  color: var(--gold);
}

.auth-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.auth-field {
  margin-bottom: 20px;
  text-align: left;
}

.auth-field label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.auth-field input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 14px 18px;
  border-radius: 8px;
  color: #fff;
  font-size: 16px;
  transition: border-color 0.2s;
}

.auth-field input:focus {
  outline: none;
  border-color: var(--gold);
}

.login-btn {
  width: 100%;
  background: var(--gold);
  color: #000;
  border: none;
  padding: 16px;
  border-radius: 8px;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 20px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s;
}

.login-btn:hover {
  transform: translateY(-2px);
  background: var(--gold-bright);
}

/* HERO AREA */
.hero {
  padding: 100px 60px 80px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.hero-tag {
  color: var(--gold);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-tag::before {
  content: '';
  width: 40px;
  height: 1px;
  background: var(--gold);
}

.hero h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(60px, 12vw, 140px);
  line-height: 0.85;
  margin-bottom: 24px;
  letter-spacing: -2px;
}

.hero h1 span { color: var(--gold); }

.hero-sub {
  max-width: 600px;
  color: var(--muted);
  font-weight: 300;
  margin-bottom: 48px;
}

.nav-pills {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-pill {
  padding: 12px 28px;
  border-radius: 4px;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 18px;
  letter-spacing: 2px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
  background: var(--surface2);
  color: var(--muted);
}

.nav-pill:hover { border-color: var(--gold-dim); color: var(--text); }
.nav-pill.active { border-color: var(--gold); color: var(--gold); background: var(--gold-dim); }

.logout-btn {
  margin-left: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
}

.logout-btn:hover { border-color: #ff4444; color: #ff4444; }

/* LAYOUT */
.layout-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
  border-right: 1px solid var(--border);
  padding: 40px 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.muscle-group-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--muted);
  padding: 16px 40px 8px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-item {
  padding: 10px 40px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s;
  border-left: 2px solid transparent;
}

.sidebar-item:hover { color: var(--text); background: rgba(255,255,255,0.02); }
.sidebar-item.active { color: var(--gold); border-left-color: var(--gold); background: var(--gold-dim); }

/* MAIN CONTENT */
.content {
  padding: 60px;
  max-width: 1200px;
}

.day-header {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 60px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.day-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 64px;
  line-height: 1;
}

.day-info {
  margin-left: auto;
  text-align: right;
}

.day-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--gold);
  margin-bottom: 4px;
}

.day-type {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* EXERCISE CARDS */
.exercise-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.3s;
}

.card:hover { border-color: var(--gold-dim); }

.card-top {
  padding: 32px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

.card-main h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 32px;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.card-tags {
  display: flex;
  gap: 8px;
}

.tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
}

.tag.gold { border-color: var(--gold-dim); color: var(--gold); }

.yt-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #ff0000;
  font-size: 11px;
  text-decoration: none;
  margin-top: 16px;
  font-weight: 600;
}

.yt-link:hover { text-decoration: underline; }

.check-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.custom-cb {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.custom-cb.checked {
  background: var(--gold);
  border-color: var(--gold);
}

.custom-cb::after {
  content: '✓';
  color: #000;
  font-weight: bold;
  opacity: 0;
}

.custom-cb.checked::after { opacity: 1; }

/* ROUTINE STYLES */
#routine-view {
  padding: 60px;
  display: none;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.report-card {
  background: linear-gradient(145deg, var(--surface), var(--surface2));
  border: 1px solid var(--border);
  padding: 32px;
  border-radius: 16px;
  text-align: center;
}

.report-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.report-val {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 48px;
  color: var(--gold);
}

.date-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.date-tab {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 16px 20px;
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  min-width: 100px;
}

.date-tab:hover { border-color: var(--gold-dim); transform: translateY(-2px); }
.date-tab.active { background: var(--gold); border-color: var(--gold); }
.date-tab.active * { color: #000 !important; }

.dt-day { font-size: 11px; color: var(--muted); text-transform: uppercase; margin-bottom: 4px; }
.dt-date { font-family: 'Bebas Neue', sans-serif; font-size: 24px; }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .layout-grid { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .hero { padding: 60px 30px; }
  .content { padding: 30px; }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 50px; }
  .day-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .day-info { text-align: left; margin-left: 0; }
  .card-top { flex-direction: column; }
  .date-tab { flex: 1; min-width: 80px; padding: 12px; }
}